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Chiltrix CX34-4 Installation And Operation Manual

Dc inverter air to water heat pump for use with g or h units with serial number beginning as cx34g or cx34h generally, these are certain units shipped after 6-15-2022, options for heating, cooling and domestic hot water
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DC INVERTER
AIR TO WATER HEAT PUMP
For Use with G or H units (with serial number beginning as
CX34H)
Generally, these are certain units shipped after 6-15-2022
(If unsure, contact Chiltrix technical support dept. with the serial number)
Installation and Operation Manual CX34-4
Options for Heating, Cooling and Domestic Hot Water
PLEASE REVIEW ENTIRE MANUAL BEFORE PROCEEDING
PLEASE SUBMIT SYSTEM DRAWING & SCHEDULE A COMMISSIONING
CALL BEFORE STARTING THE UNIT
CX34-4 (G or H) Version 2.0
Chiltrix Inc.
www.chiltrix.com
CX34G or
1

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Summary of Contents for Chiltrix CX34-4

  • Page 1 CX34G or CX34H) Generally, these are certain units shipped after 6-15-2022 (If unsure, contact Chiltrix technical support dept. with the serial number) Installation and Operation Manual CX34-4 Options for Heating, Cooling and Domestic Hot Water PLEASE REVIEW ENTIRE MANUAL BEFORE PROCEEDING PLEASE SUBMIT SYSTEM DRAWING &...

  • Page 2: Table Of Contents

    Chiltrix Inc. www.chiltrix.com Table of Contents Safety Precautions………………………………………………………………………………………… Page 3 CX34 Components………………………………………………………………………………………… Page 4 Hydronic Piping and Design…………………………………………………………………………… Page 5 Buffer Tanks…………………………………………………………………………………………………… Page 8 Head/Pressure Drop Calculations…………………………………………………………………… Page 9 Using Glycol……………………………………………………………………………………………………. Page 12 Heat Pump Installation………………………………………………………………………………….. Page 13 Valves G1, G2, G3…………………………………………………………………………………………… Page 21 Second Heat Source……………………………………………………………………………………..

  • Page 3: Safety Precautions

    Chiltrix Inc. www.chiltrix.com IMPORTANT NOTE – MAKE SURE TO PROVIDE YOUR DESIGN DRAWING FOR APPROVAL BEFORE GETTING STARTED, INCLUDING DESIRED OPERATING TEMPERATURES. Safety Precautions NOTE: It is required to read the Safety precautions in detail before operation. The precautions listed below are very important for safety, please follow all safety precautions.

  • Page 4: Cx34 Components

    Chiltrix Inc. www.chiltrix.com CX34 Components...

  • Page 5: Hydronic Piping And Design

    See the examples on the following pages, maximum water flow for the CX34 is 6-7.5 gpm, design flow is 5.2 gpm. If necessary, a second Chiltrix-provided PWM pump may be added to the loop and controlled by the CX34. The second water pump connections are always in series with the internal pump. The loop example above is designed with wild coils (loads).
  • Page 6 PLEASE ALWAYS SUBMIT YOUR DESIGN TO CHILTRIX FOR APROVAL Non-Preferred Optional Method, multiple heat pumps piped in parallel: (Requires additional loop pump supplied by installer) PLEASE SEND YOUR PROPOSED FINAL DESIGN TO CHILTRIX SUPPORT DEPARTMENT FOR APPROVAL, COMMENTS, AND SUGGESTIONS...
  • Page 7 If more than two, consider using a VCT19 or VCT37 tank and locating the fan coil units on the load side parallel to the radiant. PLEASE SEND YOUR PROPOSED FINAL DESIGN TO CHILTRIX SUPPORT DEPARTMENT FOR APPROVAL, COMMENTS, AND SUGGESTIONS Pipe Insulation All loop piping must be insulated per local and national mechanical codes.

  • Page 8: Buffer Tanks

    Primary / secondary piping is not supported, when connecting to a floor heating loop always use a buffer tank. Buffer tanks are generally needed only with floor heating with the Chiltrix system, or to combine multiple CX34 units, but are still always recommended to improve performance.

  • Page 9: Head/Pressure Drop Calculations

    Chiltrix Inc. www.chiltrix.com To calculate the head pressure for the correct water flow, the pipe length must be measured and all fittings counted. It is advisable to use flexible red oxygen barrier PEX piping and route it so as to avoid as many elbows as possible.
  • Page 10 Chiltrix Inc. www.chiltrix.com Head Calculations - Continued: The previously shown example loop has a volume of 4.5 gallons. The internal thermal expansion tank is 2 liters or .52 Gallons. The volume of the CX34 is 4.5 liters. An additional thermal expansion tank may be required for larger loops.
  • Page 11 Chiltrix Inc. www.chiltrix.com GRUNDFOS UPM GEO25-85 230V PWM This is the Grundfos pump head curve for Chiltrix CX34 and is shipped with 2021 and newer CX34 units. Note, the CX34 itself has 4.5 Ft. Head. For head curve info on the previous Wilo pump, please see page 54.

  • Page 12: Using Glycol

    Chiltrix Inc. www.chiltrix.com Glycol While not always required, customers in colder climates that are subject to occasional freezing should add an appropriate percentage of food-grade propylene glycol to the system. NEVER USE ETHYLENE GLYCOL. Ethylene Glycol is a poison. Propylene Glycol is a non-toxic anti-freeze also used in food, cosmetics, etc. and can safely be used.

  • Page 13: Heat Pump Installation

    Chiltrix Inc. www.chiltrix.com Chiltrix Heat Pump Installation Heat Pump Installation Installation position Note: Installation must be carried out by professional personnel. The recommended mounting pad should be at least 1 ½” above ground level. If you are in an area where snow occurs, mount the unit high enough above grade to avoid blockage by drifting snow.
  • Page 14 Chiltrix Inc. www.chiltrix.com Chiltrix Heat Pump Installation NOTE: The CX34 is shipped with the pump in a separate box attached to the top of the chiller. Please follow the directions below to install the “C4” Grundfos internal pump. Internal Pump Installation...
  • Page 15 Chiltrix Inc. www.chiltrix.com Internal Pump Wiring Electronics Cabinet If the Wilo RS 25/7.5 PWM pump does not have the required flow rate, a second Wilo RS 25/7.5 may be added to increase the total pump pressure and flow. This will double the head pressure capability at the targeted flow rate.
  • Page 16 Chiltrix Inc. www.chiltrix.com The blue and brown pump CONTROL WIRES are connected to the (+ & -) on the Pump PWM terminal connector at the top of the main control pcb. Pump POWER wires. Pump GROUND wire.
  • Page 17 Chiltrix Inc. www.chiltrix.com Electrical Connection General Note! Electrical installation and service must be carried out under the supervision of a qualified electrician. Electrical installation and wiring must be carried out in accordance with the NEC. The heat pump must be connected under the supervision of a qualified electrician. Wires, spare parts and materials etc.
  • Page 18 Chiltrix Inc. www.chiltrix.com Electric Connections and Component Locator...
  • Page 19 Chiltrix Inc. www.chiltrix.com CX34 System Wiring Diagram...
  • Page 20 Chiltrix Inc. www.chiltrix.com When using a second NON-PWM water pump When using a second NON-PWM water pump, use terminals L2 and C6L for relay coil power only. Do not connect a pump directly to L2 and C6L, always use a relay with a 240 vac coil.

  • Page 21: Valves G1, G2, G3

    See the Chiltrix Tank Manual before proceeding to install or connecting any DHW or buffer tank. See the Chiltrix Tank Manual for important details and options for using CX34 with DHW, including backup heat options, and anti-legionella function. READ THE CHILTRIX TANK MANUAL BEFORE DESIGNING, CONNECTING, CONFIGURING, OR USING DHW.
  • Page 22 Chiltrix Inc. www.chiltrix.com DHW (Domestic Hot Water) G1 Valve DHW and AC / Heating with two chillers in Parallel G1 and G3 valves use 220v Primary from the CX34. Use conduit and install per local code. Below shows 2x G1 valves, used this way so that Chiller 2 can continue to provide cooling or heating while Chiller 1 deals with any DHW load.
  • Page 23 7GPM. If a booster pump is needed for a different reason, this location should also be used. Check the DHW tank pressure drop from the Chiltrix Tank Manual or tank provider coil specs if not using a Chiltrix tank. The G1 valve should be located as close to the CX34 as practical.
  • Page 24 Chiltrix Inc. www.chiltrix.com G3 Valve: Seasonal Switch Valve G1 and G3 valves use 220v Primary from the CX34. Use conduit and install per local code. The G3 port can be used to control a seasonal switch valve. The seasonal switch valve is used to isolate the floor coils from the fan coils when switching over from heating to cooling.
  • Page 25 Chiltrix Inc. www.chiltrix.com G3 VALVE Seasonal Switch Valve G3 Ports...

  • Page 26: Second Heat Source

    The tank thermostat controls the element. • NOTE* THE PREFERRED WAY TO ADD BACKUP HEAT IS TO USE THE CHILTRIX V18 DYNAMIC VARIABLE BACKUP HEATER. “SECOND HEAT SOURCE” IS AN OLDER AND MORE COMMON METHOD, BUT IS NOT AS EFFICIENT AS A V18.

  • Page 27: External T-Stat Control

    Chiltrix Inc. www.chiltrix.com Onboard External Relay/T-Stat Control The internal T-Stat allows a heat pump thermostat or other external controller to control switching the heating, cooling and standby modes of the CX34 via relay. This method of control generally requires a single- stage standard heat pump thermostat, a installer provided 24 vac transformer and two relays, (Eg.
  • Page 28 C7 is DIN6 AC heating switch mode status; 0=OPEN; 1=CLOSE C8 is DIN5 AC cooling switch mode status; 0=OPEN; 1=CLOSE NOTE: Using this relay control option will override inputs from the Chiltrix standard wired controller. See the Psychrologix manual for important additional information if this applies to you.

  • Page 29: System Filling/Purging

    Chiltrix Inc. www.chiltrix.com System filling with Propylene Glycol and water At or near the CX34 a flush/fill valve assembly must be installed. This can be made with three ball valves and a couple hose fittings. See example below. Pre-mix the propylene glycol in a container large enough to hold the loop volume plus a few gallons.
  • Page 30 Chiltrix Inc. www.chiltrix.com Purging Air From DHW Tank & Fan Coils If a DHW tank is installed, it should be the first device on the loop as shown. The G1 valves should always be as close to the CX34 as possible. The tank should be as close to the G1 valve as possible.

  • Page 31: Using The Controller/Operation

    Chiltrix Inc. www.chiltrix.com Standard Controller (Included with all CX34 Units) Cooling, Heating, DHW, cooling + DHW, heating + DHW mode of operation options, automatic fault detection, alarm processing, and energy control. 1. The 4-conductor control cable can be extended up to 300 feet of 20 AWG or larger.
  • Page 32 Chiltrix Inc. www.chiltrix.com CX34 Desktop Keys Operation Status Click "Status" at the home page to enter the “C” parameter checking page as shown below. Click the arrow ">" button to go to next page.

  • Page 33: Settings Menu

    Chiltrix Inc. www.chiltrix.com Click “Setting” button, and you will enter the system setting page. Then you select the language, set time and Administrator settings. Settings Menu...
  • Page 34 Chiltrix Inc. www.chiltrix.com Language Screen Screen Saver...
  • Page 35 Chiltrix Inc. www.chiltrix.com Touch Screen Fixing (Calibration) Time Setting...
  • Page 36 Chiltrix Inc. www.chiltrix.com Back Light Setting Timer Function Click “Timer” button, you can set the heat pump to turn on and off times, you can select different working modes for different time periods. There are total 4 periods, (8 points), in the timer setting.
  • Page 37 Chiltrix Inc. www.chiltrix.com Timers 1 and 2 set to Heating Mode with no times set Timers 3 and 4 set to Heating mode with no times set...
  • Page 38 Chiltrix Inc. www.chiltrix.com Setting the mode for timer 1, same menu for timers 1-4 Timer 1 turned off, timers 1-4 use the same menu...

  • Page 39: Administrator Functions And-Parameters

    Chiltrix Inc. www.chiltrix.com Timer 1 Start time and Days of the week selected (TU and WE), timers 1-4 use the same menu Administrator Functions Click “Administrator” button, you need to enter the password “2222” to enter the “P” parameters setting page as shown below.

  • Page 40: Mode Switching

    Chiltrix Inc. www.chiltrix.com Mode Click “Mode” at homepage, you will enter mode selection page. To select the desired mode, press the corresponding button. There are 5 standard modes available with DHW enabled, plus an AU Setting. Auto Heating Target Curve Function...
  • Page 41 Chiltrix Inc. www.chiltrix.com Error Log Error Log above shown with no errors Error Log above shown with sample errors...

  • Page 42: C-Parameters, P-Parameters And Error Code Lists

    Chiltrix Inc. www.chiltrix.com Software Versions The following pages contain the (LCD) C-Parameters, P-Parameters, and Error Codes. To access the C-Parameters (read only), touch the “STATUS” button from the desktop. To access the P-Parameters touch the “SETTINGS” button from the desk top.
  • Page 43 Chiltrix Inc. www.chiltrix.com C-Parameters Read-Only LCD No. Name Range Coil Temp -30~97℃ Exhaust Temp -30~97℃ Ambient Temp -30~97℃ AC Outlet Water Temp -30~97℃ DHW Tank Temp -30~97℃ Solar Temp -30~97℃ DIN9 Status (N/A) 0（connect）；1（disconnect） DIN6 Status (Heating Switch) 1（connect）；0（disconnect） DIN5 Status (Cooling Switch) 1（connect）；0（disconnect）...
  • Page 44 Chiltrix Inc. www.chiltrix.com C-Parameters Read-Only Water Source Inlet Temp -30~97℃ Water Source Outlet Temp -30~97℃ Solar Water Tank Temp -30~97℃ Return Lubricant Oil Function Status 1=Run;0=Stop Indoor Temp -30~97℃ AC Heating Target Temp 10-55C Water Flow 0.1l/Min Compressor Total Running Time1*1000 Hour...
  • Page 45 Chiltrix Inc. www.chiltrix.com P-Parameters Description Meaning Default Auto Restart After Power Off 0：Invalid；1：Valid DHW Hot Water Temp Hysteresis Temp 2~15℃， Minus Hysteresis 2℃ AC Temp Hysteresis Temp 2~15℃，Minus Hysteresis 2℃ Coil Copper Pipe Temp To Active Defrost -20~5℃ 0℃ Temp 2 To Active Defrost -20~0℃...
  • Page 46 Chiltrix Inc. www.chiltrix.com P-Parameters Night Mode Validation (Night Mode: 0（Off）、1（On） DHW Increase 3C) Night Mode Starting Time 0-23（Time） Night Mode Ending Time 0-23（Time） Flow Switch Minimum Enabled Water Flow Switch On 6~60L/Min (CN5) Local RS485 Address 0~99 0: No Water Flow Switch 1: YF-G1 Water Flow Meter Water Flow Switch Type "Black"...
  • Page 47 Chiltrix Inc. www.chiltrix.com Error Codes Error Code Error Meaning Voltage Protection Compressor Drive Module PFC Error Abnormal Stop Of The Compressor When Running Compressor Drive Heat Sink Temperature Sensor Error Outdoor Current Sensor Error IPM Error Compressor Failed To Start...

  • Page 48: Dynamic Outdoor Reset Control

    Chiltrix Inc. www.chiltrix.com Dynamic Outdoor Reset Control The Chiltrix CX34-4 unit is equipped with an automatic outdoor reset function that can be accessed via the onboard controller. Advantages & Misconceptions of Using Outdoor Reset Most people in the radiant heating industry will tell you that outdoor reset is used to get more BTU delivery from the radiant system on a day when the radiant system can't deliver enough BTUs to keep up with the load, and they use outdoor reset to crank up the radiant heat operating temperature to 120F, or higher.
  • Page 49 Chiltrix Inc. www.chiltrix.com How to Use Chiltrix Dynamic Outdoor Reset Control Use With or Without V18-B Backup Heat (Current Model) Not For Use With V18 (original model) Use the free Excel curve development worksheet tool to create the proper curve and discover correct parameter settings for P45 and P46.

  • Page 50: Auto Switch-Over

    Chiltrix Inc. www.chiltrix.com How to Use Automatic Switch-Over This is now an on-board function and does not require a separate add-on controller to operate. This function allows the CX34 to automatically select its mode, either heating, cooling, or standby (off), according to outdoor temperature.

  • Page 51: Commissioning

    Chiltrix Inc. www.chiltrix.com Commissioning “To Be Performed In Heating Mode Only” An as-built design will need to be provided to Chiltrix by email before the commissioning call. For Commissioning please arrange a commissioning call with Chiltrix Support Dept. +1 757-410-8640 Ext. 112...

  • Page 52: Footprint/Placement Dimensions

    Chiltrix Inc. www.chiltrix.com...
  • Page 53 Chiltrix Inc. www.chiltrix.com...

  • Page 54: Wilo Pump Flow Curve

    Chiltrix Inc. www.chiltrix.com Chiltrix CX34 Internal Pump: Wilo Yonos PARA RS 25/7.5 PWM1 Ku...

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